Thanks Sylv3rblade for your response… So what can I do to be able to have CFW in my psp. Can I downgrade… how can I get what I need to downgrade? Also if I am able to downgrade, what would be the CFW that I would need?

I recently bought a psp from ebay with a custom shell so I don’t know if its a 2000 or a 3000 series, it is not a fat one for sure… it has firmware version 5.00 m33-4. I tried installing gen d3 but the psp just turns off. Also I tried downloading 5.00 m33-5 and 5.00 m33-6, but it sems that the files are no longer available for download. What can I do to be able to play the latest games?